I got an account from dyndns.org and got XXXXXXXXXXX.dyndns.org (domain). I have no idea how to set up web server. I used apache and tried ftp server but when i type in XXXXXXXXXX.dyndns.org it will take me to the router log in page. How can i make it go to my computers server?

I port forwarded the ports on the router 21(ftp) and 80 for http server and tried without forward but still no luck and tried others.

You have to set the server up first, then set the router to port forward from that port to your machine in your local network....